TY - GEN
T1 - Elemental distribution and charge collection at the nanoscale on perovskite solar cells
AU - Stuckelberger, Michael
AU - Nietzold, Tara
AU - Hall, Genevieve N.
AU - West, Bradley
AU - Werner, Jeremie
AU - Niesen, Bjoern
AU - Ballif, Christophe
AU - Rose, Volker
AU - Fenning, David P.
AU - Bertoni, Mariana
N1 - Funding Information:
Work at the Advanced Photon Source and use of the Center for Nanoscale Materials was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. We thank Swiss National Science Foundation for support through the Nanotera and PNR 70 programs. Bradley West is supported by an IGERT-SUN fellowship funded by the National Science Foundation (Award 1144616).
Publisher Copyright:
© 2017 IEEE.
PY - 2017
Y1 - 2017
N2 - Unveiling the correlation between elemental composition, fermi-level splitting, and charge collection in perovskite solar cells (PSCs) exposed to different environments is crucial to understanding the origin of defects. This will enable defect engineering to achieve high performing and long lasting perovskite solar cells. In this contribution we measured for the first time the spatial distribution and charge collection efficiency at the nano-scale by synchrotron-based x-ray fluorescence (XRF) and x-ray beam induced current (XBIC) with sub-grain resolution, and we observe a correlation between Pb/I ratio and charge collection efficiency. In contrast to other thin-film solar cells, perovskite solar cells are highly sensitive to ambient conditions (atmosphere and illumination). As the XRF and XBIC measurements were conducted in vacuum under an x-ray source illumination, the impact of measurement conditions on the measurements need to be taken into account. Furthermore, necessary conditions for quantification of XRF/XBIC measurements are not fulfilled for perovskite solar cells. Therefore, we will discuss fundamentals of XRF/XBIC measurements of perovskite solar cells that will enable reliable quantitative, high-resolution measurements of elemental distribution and charge collection.
AB - Unveiling the correlation between elemental composition, fermi-level splitting, and charge collection in perovskite solar cells (PSCs) exposed to different environments is crucial to understanding the origin of defects. This will enable defect engineering to achieve high performing and long lasting perovskite solar cells. In this contribution we measured for the first time the spatial distribution and charge collection efficiency at the nano-scale by synchrotron-based x-ray fluorescence (XRF) and x-ray beam induced current (XBIC) with sub-grain resolution, and we observe a correlation between Pb/I ratio and charge collection efficiency. In contrast to other thin-film solar cells, perovskite solar cells are highly sensitive to ambient conditions (atmosphere and illumination). As the XRF and XBIC measurements were conducted in vacuum under an x-ray source illumination, the impact of measurement conditions on the measurements need to be taken into account. Furthermore, necessary conditions for quantification of XRF/XBIC measurements are not fulfilled for perovskite solar cells. Therefore, we will discuss fundamentals of XRF/XBIC measurements of perovskite solar cells that will enable reliable quantitative, high-resolution measurements of elemental distribution and charge collection.
KW - Charge collection
KW - Perovskite
KW - Solar cell
KW - XBIC
KW - XRF
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U2 - 10.1109/PVSC.2017.8366236
DO - 10.1109/PVSC.2017.8366236
M3 - Conference contribution
AN - SCOPUS:85048473135
T3 - 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
SP - 761
EP - 766
BT - 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 44th IEEE Photovoltaic Specialist Conference, PVSC 2017
Y2 - 25 June 2017 through 30 June 2017
ER -